Membrane-electrode assembly and fuel battery using the same

Details Membrane-electrode assembly and fuel battery using the same Membrane-electrode assembly and fuel battery using the same

H - Electricity

01

M

H01M 4/90 (2006.01) H01M 8/02 (2006.01) H01M 8/10 (2006.01)

Patent

CA 2680251

This invention provides a membrane-electrode assembly comprising an electrode catalyst using a base metal complex. The membrane-electrode assembly has an exchange current i0 of not less than 5.0 ~ 10-4 Acm-2 as determined from a Tafel plot regarding current density and voltage and a Tafel slope is not more than 450 mV/decade. There is also provided a membrane-electrode assembly comprising a catalyst layer containing an electrode catalyst provided on both sides of an electrolyte membrane. At least one of the catalyst layers contains a nonnoble metal-type electrode catalyst, and the electrolyte membrane is a hydrocarbon electrolyte membrane.

Cette invention concerne un ensemble membrane-électrode comprenant un catalyseur d'électrode utilisant un complexe de métal de base. L'ensemble membrane-électrode a un courant d'échange i0 de pas moins de 5,0 ~ 10-4 Acm-2, tel que déterminé à partir d'un tracé de Tafel concernant une densité de courant et une tension et une pente de Tafel n'est pas plus de 450 mV/décade. L'invention concerne également un ensemble membrane-électrode comprenant une couche de catalyseur contenant un catalyseur d'électrode disposé sur les deux côtés d'une membrane électrolytique. Au moins l'une des couches de catalyseur contient un catalyseur d'électrode de type métal non noble, et la membrane électrolytique est une membrane électrolytique d'hydrocarbure.

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